I was working on a piece on GarageBand, got all of the live tracks and easy drummer tracks recorded with working audio all throughout. plugged in my midi keyboard and now I can't seem to get any output whatsoever. When I press play it looks like there is signal from the audio tracks but no sound comes out anywhere. I've tried swapping the output preferences from my focus rite and built in output with no luck. This hasn't affected any other GarageBand projects and my midi keyboard works just fine on other projects. Any ideas of how I can get the audio to work?